Will Quicken allow investments, including passive, e.g. a small rental real estate business, or would one still want Quickbooks for that?
I think you will be happer with Quickbooks for any kind of business. Its a little more flexible. Quicken really works best with just checking and credit card accounts. There is a free trial versions of Quickbooks available on their websight. Check it out for yourself. http://quickbooks.intuit.com/product/accounting_software/free_accounting_software.jhtml
Quickbooks is what I use in my real estate dealings and in my holster making business. Something you may want to check into is this http://www.realestatetaxlaw.com/products.php#kiss.. It comes with a COA for real estate investments and helps to keep your books right. He is also a tax attorney.